Info |
Quadrant sash lock available today
The quadrant sash lock is characterized by an arm that rotates 90 degrees to regulate the operation of the lower sash of a window unit. Quadrant sash locks first appeared in a hardware catalog in 1874 (Sargent, page 212). During the succeeding four decades, the design of the quadrant sash lock followed the general design of the Judd sash lock. The historic run of the quadrant sash lock ended in 1911 (Reading catalog, page 691). The quadrant lock was revived in the late twentieth centry and remains in production.
The historic quadrant sash locks are often confused with the Judd locks due to their similar appearance. These changes provide clues to the date of the quadrant locks. In the initial phase (1870s), quadrant locks generally had a knob at each end of the moveable arm. The arm had a pendant that swung into a depressed arc in the portion of the device attached to the top of the lower sash, ending at a stop (see below).
Quadrant sash lock as illustrated in the Sargent hardware catalog of 1874, page 212.
In the early 1880s, quadrant locks had a boxier housing attached to the upper sash, and the moveable arm ran around the perimeter of the catch rather than inside a depressed arc on the inside:
Quadrant sash lock as illustrated in the Strelinger hardware catalog of 1880, page 176.
The third phase of the historic quadrant sash fastener extended from 1884 to 1911. A simplified design was offered during these years. The arm had a tab at the end, unlike earlier years that placed either a metal or porcelain knob in this location. When the arm swung out, it engaged a catch that secured the arm in place to lock the sashes.
Quadrant sash lock as illustrated in the Hibbard hardware catalog of 1891, page 265.
|